Hmm, although UFO has the smallest cast yet (no unique midboss characters, although it's not really smalelr if you count Unzan), the "UFO family/shrine" is the biggest with 7 people; Nazrin, Ichirin, Unzan, Murasa, Shou, Byakuren, Nue, even larger than the SDM crew, which has 6; Meiling, Koakuma, Patchy, Sakuya, Remi, Flan.
Also
The youkai ... were there perhaps
a tiger, a ghost spirit, and a Nyuudo?
Ahahahahaha even Byakuren remembers Unzan over Ichirin.